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preserved to the day of his death a wonderful elasticity of mind, which not 

 only enabled him to take a lively interest in every new discovery made 

 by others, but to continue his own scientific labours. He died, after a 

 short illness, on the 19th of March, 1871, at Dornbach near Vienna, 

 and was buried in the cemetery of that place on the 22nd. 



He was the author of at least three hundred and twenty papers on 

 the characters of many new minerals, mineralogical optics, pleochroism, 

 pseudomorphs, geology, meteorology, and on the freezing and break- 

 ing up of the ice of rivers. During the years 1859-18/0 he wrote a 

 number of remarkable memoirs on meteors and meteorites. These are 

 for the most part to be found, in addition to the Journals and Trans- 

 actions already mentioned, in the ' Naturwissenschaftlichen Abhand- 

 lungen,' 'Berichte iiber die Mittheilungen von Freunden der Naturwis- 

 senschaften in Wien,' the ' Denkschriften 5 and ' Sitzungsberichte der k. 

 Akademie der Wissenschaften : ' one was published in the * Proceedings 

 of the Royal Society' for December 1868 ; it is entitled "On the Phe- 

 nomena of Light, Heat, and Sound accompanying the Fall of Meteor- 

 ites." The last scientific papers he wrote, on the Meteorite of Meno, 

 and on laboratory crystals of pyrite obtained by Professor Wohler of 

 Gottingen, were published in the ' Realschule,' a Journal edited by his 

 son-in-law, Dr. Eduard Doll. He was Member, or Correspondent, of 

 upwards of a hundred learned Societies, Knight of various Orders, in- 

 cluding the Austrian Order of Franz Joseph and the Prussian of Pour 

 le Merite, He was elected a Foreign Member of the Royal Society in 

 1856. On the 29th of April, 1856, a Gold Medal, subscribed for by 

 numerous friends, in recognition of his merits as the founder of a new 

 scientific era for Austria, was presented to him. On the 5th of February, 

 1865, the seventieth anniversary of his birthday, his bust in marble, the 

 cost of which was defrayed by the subscriptions of residents in almost 

 every country in Europe and in many of the most distant colonies, was 

 installed in one of the rooms of the Geologische Reichsanstalt. 



Heinrich Gtjstav^Magnus, elected Foreign Member of the Royal 

 Society in 1863, was born on the 2nd of May, 1802, in Berlin, where his 

 father, Johann Matthias Magnus, had founded a large mercantile establish- 

 ment. At an early age he exhibited great aptitude for the study of Mathe- 

 matics and the Natural Sciences, and was fortunately sent to a school in which 

 particular care was bestowed upon instruction in the subjects which chiefly 

 interested him. The easy circumstances of his family having enabled him 

 to select the career that best suited his tastes and capacity, he deter- 

 mined to devote all his powers to the cultivation of Chemistry, Physics, 

 and Technology. He entered the University of Berlin in 1822. Under no 

 obligation to hurry through his Academic studies, he employed the fol- 

 lowing five years in attending lectures on Chemistry, Physics, and Mathe- 

 matics. He also worked diligently in the University Laboratory, and 



